Definitions for "Achromatic Lens"
An optical lens designed and coated to correct for the tendency of light to separate into colors when passing through glass, called chromatic aberration.
An 18thC development combining FLINT GLASS and crown glass to remove distorting colour fringes from the image. It was patented by Englishman John Dollond in 1758 and used in telescopes and microscopes.
a lens specially designed and coated to correct for the tendency of light to separate into colors when passing through glass. An achromatic lens corrects this such that colors are more accurate after being magnified. BACK
a closely spaced, often cemented, combination of positive and negative elements with differing refractive indices